[Sign-in system + double cultivation of medicine and poison + sister Lin of the group pet + edible of the unread Red Mansion]. When Lin Yan, who cultivated both medicine and poison, entered the Red Mansion and became Daiyu who could cough and die in the cold wind, she hated the injustice of fate and had no eyes. So Duang had a check-in system at once. Millennial Blood Phoenix Lotus? Divine Beast Vermilion Bird Blood? All the rewards are available! Those men in the Jia family can't do it? Unite the sisters to save the family! When you are sick, you come to take medicine, you want to die and swallow poison, you have nothing to do to play Gu, and the bad guys all become stupid pigs~ Baoyu: Feng'er only plays with the girls, is there me in my heart? Lin Yan: Yes, you have to add money. (The characters who did not appear in the original book are all self-created, and the timeline moves around according to the needs of the plot, and there is no main CP, you can take what you need)